[JulianSch]

Hi everyone,

I am simulating a rotational movement of an airfoil with pimpleFoam & displacementLaplacian.
After 558 of 1000 time steps, the simulation crashes due to an overlap of cells at the bottom:


I have already tried several things such as changing the cell diffusivity from

displacementLaplacianCoeffs {
    diffusivity uniform;
}

to

displacementLaplacianCoeffs {
    diffusivity exponential 0.01 inverseDistance ("airfoil.*");
}

Also I have changed the timestep size from

deltaT          0.01;

to

deltaT          0.001;

which resulted in an even earlier collision of cells.

Now I am asking, which parameters I could change in addition to avoid this cell overlap / collision.

You can find further videos of the mesh movement here:
airfoil bottom
airfoil top
airfoil

In addition I have attatched the files of the case here.
(It is a coupled simulation with the coupling library preCICE, which couples OpenFOAM to MBDyn. Therefore you cannot run pimpleFoam without preCICE and MBDyn installed, but you can look at the files in the fluid folder.)